How to Jailbreak iOS 4.2.1 for iPhone 4 / iPhone 3GS / iPhone 3G / iPad

Here ia a video guide on how to Jailbreak the iPhone iOS 4.2.1 with RedSn0w 0.9.6b4 tethered for iPhone 3G, iPhone 3GS, iPhone 4, iPod Touch 2nd gen, ipod touch 3rd gen, ipod touch 4th gen, iPad, iPad 3G.

Note: All users relaying on unlock stay away! this will update your baseband = no unlock.

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